Device to prevent rolling of bobbins



Dec. 16,1924. I

w. H. WAKEF|ELD-ET AL DEVICE TO PREVENT ROLLING OF BOBBINS Filed Feb. 25, 1924 /NVEN7'O/I'J 7 001: F //0FF/V/1/Y MLTE/F hf WAKEFIELD I ATrm/vEYa Patented Dec. 16, E924.

UNITE SITES ()FFICE.

WALTER H. WAKEFIELD AND LOUIE HOFFMAN, OF WORCESTER, MASSACHUSETTS,

ASSIGNORS T0 GROMPTON & KNOVJLES 110 015): WORKS, OF WORCESTER, MASSA- CHUSETTS, A CORPORATION OF MASSACHUSETTS.

DEVICE TO PREVENT ROLLING OF ROBBINS.

Application filed February 25, 1924.

To all whom it may concern:

Be it known that we, VVALTER H. "WAKE- FIELD and Loom F. HOFFMAN, citizens of the United States, both residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Device to Prevent Rolling of Bobbins, of which the following is a specification.

This invention relates to weft replenishing mechanism for looms and more particularly to devices for preventing rotation of the bobbins on their axes as they await transfer.

In a type of weft replenishing mechanism which has gone into very general use the bobbins of differing colors or characteristics are held in compartments and are moved to transfer position by mechanism controlled jointly by weft detecting and color indicating mechanism. In such mechanism it has been found that the bobbins roll on their own axes so that the threads which extend to the thread holder become entangled and are likely to break at the time of transfer.

It is the general object of our invention to provide means for restraining the rotation of bobbins while in their compartments so that the objectionable entangling of the weft ends may be prevented.

A further object of our invention is to provide means for acting upon the bobbins of adjacent compartments so that one bobbin engaging device will serve a plurality of compartments.

A still further object of our invention is to provide replenishing mechanism controlled devices which shall move substan tially parallel to the axes of the bobbins to bring inclined faces against portions of the bobbins to move the latter sideways against fixed portions of the replenishing mechanism and hold the same against rotation.

With these and other objects in view which will appear as the description proceeds, our invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein we have illustrated one form of our invention,

Fig. 1 is a side elevation taken from the central portion of a loom and showing our Serial No. 694,877.

invention applied to one form of replenishing mechanism,

Fig. 2 is a vertical section taken on line 2-2 of Fig. 1,

Fig. 3 is a horizontal section taken on line 3-3 of Fig. l, and

Fig. 4 is a fragmentary view similar to Fig. 2 but showing the parts in a different position.

Referring more particularly to the drawings it will be seen that We have provided a magazine having a supporting foot 18 and an inner frame 11 upon which are mounted for vertical sliding movement the slides 12 and 18 which control respectively the eradles 14 and 15 interposed between the reserve bobbins and the transfer position to which they move as the cradles oscillate. Slidably mounted in bearings 16 is a rod 17 having fastened thereto a finger 18 which moves between bosses 19 and 20 formed on each of the slides 12 and 18, respectively. Extending substantially parallel to the bobbins are fixed walls 21 and 22 which form the outer limits of bobbin compartments 23 and 24, respectively. The matter thus far described is of the usual construction and for a further description thereof reference may be had to Patent No. 1,030,7d8.

Our invention relates more particularly to the movable wall 30 located between the fixed walls 21 and 22 and the mechanism by which it is moved into and out of engagement with the bobbins to prevent their rotation. Referring particularly to Figs. 1 and 2 it will be seen that the vertical slides 12 and 13 are provided respectively with cam portions 31 and 32 and that the movable wall 30 is provided with an actuator 33 which is fastened to the said wall and is formed with an elongated head 40 to be engaged by one or both of the cams 31 and 32. In order to guide the wall 30 we provide the same with upper and lower guide rods 35 which have fastened thereto collars 36. Surrounding the rods 35 and interposed between the collars and the frame 11 are compression springs 37 which act to draw the movable wall toward the frame of the replenishing mechanism. In order to com pensate for variations in the heads of the bobbins we may provide the wall 30 with a flexible material such as rubber or leather,

indicated at 38, and form said material with inclined faces 39. p

Under normal conditions the parts will assume the position shown in full lines in Figs. 1, 2 and 3 with the cradle-controlling slidesin lowered position and the springs 37 acting through the collars 36 and guide rods 35 to hold the yielding inclined surfaces 39 against the heads of the bobbins. At indication of weft exhaustion the finger 18 will be raised to lift one of the slides, slide12 being indicated as raised in Fig. a. As the slide moves upwardly the corre sponding cam (31 as shown on the drawings) will engage the head a of the actuator 33 and move the plate away from the frame 11 against the'action of springs 37 until the wall assumes the'dotted line position indicated in Fig. 3 and the full line position shown in Fig. 4-. This releases the bobbins of the compartments lying on either side of the wall 30 so that they may be free to descend in response to the demands of thereplenishing mechanism. lVhen transfer is about to take place,finger 18 will move downwardly due to the regular action of the replenishing mechanism and the which was previously raised is lowered so that the actuator 33 is released and the springs 37 permitted toreturn the parts to the starting position indicated in full lines in Figs. 1 and 2. This action again moi es the yielding surfaces 39 against the bobbins so that they will be restrained against rotation on their own axes.

It will be seen from the foregoing that we have provided a simple movable wall having inclined faces which engage the heads of the bobbins and serve to move them not only against the inner frame 11 but also against the fixed walls 21 and 22. Said movable wall is under control of the replenishing mechanism and is acted upon to release the bobbins at such times as they are called upon to move downwardly in the operation of the replenishing mechanism. It will further be seen that a comparatively small part of the bobbin lies between the movable wall and the frame 11 and that for this reason the variations in the dimensions of those parts ofthe bob bins which are engaged by the wall is reduced to a minimum. It will further be notedthat the force exerted by one side of the movable wall against the adjacent bobbins is balanced by an equal force in the opposite direction exerted by the other side of the said wall, the net result of which is to prevent the guides from being sub jected'to lateral strains. It is to be understood that while we have shown our movable wall as associated witha pair of compartments, yet we do not wish to be limited to this construction in carrying out the principle of our invention.

Having thus described our invention it will be apparent that changes and modifications may be made therein'by those "skilled in the art without departing from the spirit and scope of the invention and. we do not wish to be limited to the details herein disclosed, but what we claim is;

1. In a weft replenishing mechanism for looms, a compartment for the heads of the bobbins having a. fixed and a relatively movable wall, means to move said movable wall substantially longitudinally of the axes of the bobbins, and means carried by. said movable wall to engage the heads of the bobbins and force the same laterally against the fixed wall.

2. In a weft replenishing mechanism for I looms, a compa-rtn'ient for the heads of the bobbins having a fixed wall, a wedge shaped wall movable with respect to the fixed wall, and means to move the Wedge shaped wall against the heads of the bobbins to force the latter laterally against the fixed wall.

3. In a weft replenishing mechanism for looms, a compartment .for the heads of the bobbins having one side defined by a fixed wall and the other side thereof defined by a movable wall of varying thickness trans versely of the axes of the bobbins, and means to move the wall of varying thickness substantially parallel to the axes of the bobbins to engage the latter and move them laterally toward the fixed wall.

in a weft replenishing mechanism for looms, a compartment for the heads of the bobbins having a fixed wall and a relatively movable wall, means to move the movable wall in a direction from the center of the bobbins toward one end of the bobbins, and means operating through'such movement of the movable wall to force the bobbins laterally against the fixed wall.

In a weft replenishing mechanism, a bobbin compartment having a fixed wall, and bobbin ei'igaging means a point intermediate the ends of the bobbins toward the head end of the bobbins to engage the heads of the bobbins and force the latter against the fixed wall.

6. In a weft replenishing mechanism for looms, a bobbin compartment, fixed means on one side of the compartment normally in engagement with one side of the bobbins, and means movable from a point intermediate the ends of the bobbins toward one end thereof to move the latter toward said fixed means and in engagement therewith.

7. In a weft replenishing mechanism for looms, a compartment for bobbins, a wall defining one side of the compartment, and

means to move said wall in a direction substantially parallel to the axes of the bobbins, said wall having portions to engage the sides of the bobbins and move the same movable from i laterally of their axes against other portions of the compartment.

8. In a weft replenishing mechanism for looms, a bobbin compartment having a fixed wall, a wall movable substantially parallel to the axes of the bobbins and having an inclined face adjacent the bobbins, and means to move said movable wall to bring the inclined face thereof into engagement with the bobbins to force the latter against the fixed wall.

9. In a weft replenishing mechanism for looms having a frame and a fixed wall, movable wall defining with the fixed wall a bobbin compartment and having an inclined surface to engage the bobbins, and means under control of the replenishing mechanism to give said movable wall a motion substantially parallel. to the axes of the bobbins to causes said inclined surface to engage the heads of the bobbins and force them against said fixed wall and also against the frame of the replenishing mechanism.

10. In a weft replenishing mechanism for looms, bobbin compartment having a fixed and a movable wall between which walls the heads of the bobbins lie, means to move said movable wall in a direction substantially parallel to the axes of the bob-bins, and means defining a face angularly disposed with respect to the axes of the bobbins to engage the heads of said bobbins when the movable wall is moved to force the bobbins against said fixed wall.

11. In a weft replenishing mechanism for looms, a pair of compartments for the heads of the bobbins, fixed outer walls for the compartments, a wall intermediate the fixed walls and mo able substantially parallel to the axes of the bobbins, and means carried by the movable wall to force the bobbins of each compartment laterally against the fixed wall thereof as the intermediate wall is moved.

12. In a weft replenishing mechanism for looms, a pair of bobbin compartments, each compartment having an outer fixed wall, an inner wall common to both compartments and movable in a direction substantially parallel to the axes of the bobbins, means to move saidwall, and means carried by said wall to engage the bobbins of each compartment and force them against the fixed walls.

153. ln a weft replenishing mechanism for looms, a pair of bobbin compartments each having a fixed wall, a movable wall intermediate and common to bot-l1 compartments, said movable wall being of varying thicknesses transversely of the compartments, and means to move said wall to bring the thicker portions thereof into engagement with the heads of the bobbins to force said heads against the fixed walls 14. in a weft replenishing mechanism, a pair of bobbin compartments each having a fixed wall. wall between the fixed walls and movable substantially parallel to the axesof the bobbins from a point intermediate the ends of the bobbins toward one end thereof, and means carried by said movable wall to force the bobbins of each compartment againstthe adjacent fixed wall.

15. In weft replenishing mechanism for looms. a plurality of bobbin compartments, a replenishing mechanism controlled means associated with each compartment for con trolling the movement of the bobbins of each compartment, and means common to the compartments and movable substantially parallel to the axes of the bobbins to engage the heads of the bobbins in each compartment and move them laterally, said means being under control of each of the replenishing mechanism controlled means.

16. In a weft replenishing mechanism for looms, a pair of bobbin compartment-s, a wall common to the compartments and movable substantially parallel to the axes of the bobbins, guiding devices for said wall, and bobbin engaging means on said wall one each side of the guiding devices to engage the bobbins of the compartments and exert on the bobbins a force directed laterally of bobbins.

17. In a weft replenishing mechanism for looms, a pair of bobbin compartments, a fixed wall for each compartment, a wall common to both compartments and movable substantially parallel to the axes of the bobbins, said movable wall having inclined faces adjacent the bobbin, and means to move said movable wall to bring the inclined faces into contact with the bobbins and force them against the fixed walls.

18. In a weft replenishing mechanism for looms having a frame and a pair of fixed walls, a movable wall defining with the fixed Wall compartments for the reception of the heads of bobbins, said movable wall having inclined surfaces, and means under control of the replenishing mechanism. to give said movable wall a motion substantially parallel to the axes of the bobbins to cause said inclined surfaces to engage the heads of the bobbins and force them against the fixed walls and also against the frame of the replenishing mechanism.

In testimony whereof we have hereunto afiixed our signatures.

WALTER H. WAKEFIELD. LOUIE F. HOFFMAN. 

